An agricultural scientist tested an unknown plant hormone, H, in two investigations.
In both investigations, all other conditions were kept the same.
| Investigation | Without hormone H | With hormone H |
|---|---|---|
| Dormant lettuce seeds that germinated after 5 days (%) | 14 | 76 |
| Mean mass of each melon fruit at harvest (kg) | 1.6 | 2.1 |
Explain which plant hormone H is most likely to be.
Use data from both investigations in your answer.
Suggest one other commercial use of hormone H.
87 exam-style questions on AQA GCSE Biology 5.4 Plant hormones, covering 5.4.1 Control and coordination and 5.4.2 Use of plant hormones (HT only). Each one has a worked solution and a mark scheme showing where the marks go.